Electrotherapeutical instrument



Oct. 15, 1929.

c. J. JOHNSON ET AL EILECTROTHERAPEUTICAL INSTRUMENT Filed June 6, '1927 JWMW,

Ad, I

Patented a. 15, 192.9

' UITED STATES PATENT o FrcE GAR-L J. JOHNSON AND AARON B. JOHNSON, OF LOUISVILLE, KENTUCKY ELECTROTI-IERAPEUTICAL TNSTRUMENT' Application filed .Tune 6, 1927. SerialNo. 196318.

This invention provides an instrument utilizing the Oudin, Tesla or monopolar current of a high frequency machine for de hydrating, desiccating or coagulating tissues of the human body without the grounding of the current through the bodyof the pa tient subjected to treatment.

lVhile the drawing illustrates a preferred embodiment of the invention, it is to be understood that in adapting the means to meet specific needs and requirements the design may be varied and such other changes in the minor details of construction may be resorted to within the scope of the invention as claimed, Without departing from the spirit thereof.

F or a full understanding of the invention and the merits thereof, reference is to be had to the following description and the drawing hereto attached in which,

Figure 1 is a vertical, central longitudinal,

sectional view of an electrical instrument of the character aforesaid embodying the invention.

Figure 2 is a front View of the instrument.

forms of electrodes adapted to be interchangeably fitted to the body of the instrument. 7

Corresponding and like parts are referred to in the following description and desig nated in the several views of the drawing by like reference characters. I r

The body 1 of the instrument is elongated and slender and is provided at one end with a grip 2, which preferably forms a part of the body. The body and grip are preferably formed of insulating material, such as hard rubber Bakelite and the like. These parts may be molded or formed in any preferred way and contain openings for the passage of elements 3, 4 and 5. The elements 4- and 5 consist of wires or conductors for electricity. The element 3 consists of a needle which is slidably fitted within the body 1 and projects at opposite ends, the front end being pointed and the rear end having a button 6 of insulating material fitted thereto.' An open coil spring 7 is mounted upon the rear projecting end of the needle and is con- Figures 3 and 4 are side views of different connected to a screw 10 or like element applied to the end of the grip 2. An electric cord 11 is connected to the screw 10 and may beplugged into an outlet or connected to a source of current in any Well known inanncr. metal plate 12 is fitted to a side of the grip 2 and the current is grounded thereby through the operator. The wire 4 is connected atone end to the plate12. and its opposite end projects beyond the front end of the body land is adapted to have an electrode 13fitted thereto. 1 V

Various forms and sizes of electrodes are provided and are adapted to be selectively or interchangeably fitted to the projecting end. of the electric conductor 4. The electrodes usually consist of a-stein, and a pressure head, thestembeing' formed with a socket to receive the projecting end of the electric conductor twhic'h, iii the preferable construction are connected by means of aiscrew-thread joint, as indicated most clearly in Figure 1 of the drawing. The head of the'electrodeis generally ofjannula'r'form,

asindicated most clearly in Figure 2, and may be' of any diameter depending upon the extent of tissue to be treated. i I v VVhenthe instrument is inactive service it is held in the hand of the operator'by means of the grip 2, and is applied by .plac ing the head'of the electrode: 13 in contact with the tissue to be treated. Pressure is now exerted upon the button 6 with the result that the needle 3 is pressed forward. and its point caused to penetrate the tissue. It is assumed that the current is on and enters the tissue through theneedle and passes off by way of the electrode 13, and'is grounded through'th e operator by means of the wire lan'dplate12. The flow of the high frequency' current .dehydr'ates; desiccates and coagulates thQ'tlSSllt-E, the degree of such: ac

claim 1. A therapeutic instrument for the practice of electro-coagulation and desiccation by means of high frequency currents comprising an elongated body having a grip at one end, a needle slidably mounted upon the body, I

electric conductors passing through the body and grip, one of said conductors being' electrically connected with the needle, an elect-rode connected to the other electric conductor and adapted to coact with the said needle, and a metal plate applied to the grip and having the electric conductor of the electrodes connected thereto, whereby toground the current through the operator.

2. A therapeutic instrument for the practice of electro-coagulation and desiccation by means of high frequency currents comprising a body having an offstanding grip at one end, a needle slidably mounted within the body, and having its pointed end projecting at the front thereof, means for supplying an electric current to the needle, an electrode fitted to the front of the body, and a current grounding plate fitted to the grip and electrically connected with the said electrode.

, 3. A therapeutic instrument for the practice of ele ctro-coagulation and desiccation by means of high frequency currents, the same comprising a stem, and a pressure head of annular form at one end of the stem, and perpendicular thereto. 7 c 1 4:. A therapeutic instrument for the practice ofelectro-coagulation and desiccation by means of high frequency currents comprising a body. providedwith a grip, a needle slid ably mounted in the body and projecting beyond the ends thereof, a metal plate fitted tothe rear end of the body and having the needle operating therethrougl1,an electric conductor withinthe grip, and connected to the said plate, an electrode at the front end of the body adapted to coact with the said needle, a

plate appliedto thefgrip for grounding the current through the} operator, and an electric conductor connecting the said electrode with the current grounding plate.

5. A therapeutic instrument forthe practice of electro-co agulation and desiccation by means of high frequency currents comprising a slender body provided at one end with an oflstanding grip, a metal plate fitted to the rear end of the body, a needle slidably mounted within the body and plate, and projecting beyond opposite ends ofthe body, an open coil spring mounted upon the rear projecting end of'the needle, a current grounding plate ap plied to the grip, an electric conductor pass AARON B. JOHNSON. [1,. 8. 

